So here are the results. In order to get this to work you are going to have to enlarge the hole in the reflector. Once it is large enough the Led will fit right in and actually is pretty well focused with it's placement inside the reflector.
As you can see it is pretty effective. Next comes placement in the Puck. For the Led to fit in the reflector properly the LED is going to have to be connected Via the bottom connections because the top must be clear so that the Led will fit inside the reflector. I then placed a thin layer of thermal epoxy inside the reflector so that the top connections would not make contact with the reflector. I placed a small bit of metal between the led and the puck to elevate it. This is not permanent though this is just for momentary on off testing. When this is completed I will be placing a better heat sink down with some thermal epoxy.
This is the completed comparison results:
I'd probably be correct by saying that it is twice as bright as before. The beam is not perfect though. The beam is quite ringy. First I though this was because of the reflector but from further analysis I've realized that the dome on the led is the problem. The dome it self is ringy and if looked at it up close you can see that the shape is a dome with a noticeable ring around the dome. I currently own only one cree xr-e so I can't really compare them at the moment. From the next picture you can see the swirls with the noticeable inside ring.
If you to ignore the ring though I'd say that the beam has a pretty comparable hot spot to the original Lux III with much more spill.
As for brightness here is some comparisons:
( ALL comparisons are at the same exposure 500th / 8.0 / iso200 )
Even though the brightness of the next two look similar I'd say by eye the cree looks brighter and as you can partially see the cree has more spill
This is a lower exposure.
In the end I'd say that this is a pretty easy mod and worth the effort. The entire Luxogen line up are very modder friendly lights and make great hosts. I Don't own equipment to test brightness or power.